import { getBackendUrl } from './config';
import { getApiKey, setApiKey, clearApiKey } from './adminAuth';
import type {
	AdminSettings,
	AdminSource,
	AdminTrackedEvent,
	CategoryPriority,
	ModelCatalog,
	AiStatus,
	TelegramStatus,
	LogEntry,
	GeocodeResult,
	AdminStockTicker,
	AdminBookmark,
	Poe2BrowseEntry,
	AdminPoe2Entry,
	AdminWeatherSettings,
	InstalledWidget,
	WidgetUploadManifest
} from './adminTypes';

async function request<T>(path: string, options: RequestInit = {}, fetchFn: typeof fetch = fetch): Promise<T> {
	// Fastify's default JSON body parser rejects an empty body when Content-Type is
	// application/json ("Body cannot be empty when content-type is set to
	// 'application/json'") — so this header is only attached when there's actually a
	// body to send (PATCH/POST with a JSON payload), never for bodyless DELETE/POST calls.
	const headers: Record<string, string> = { ...(options.headers as Record<string, string> | undefined) };
	if (options.body) headers['Content-Type'] = 'application/json';
	const apiKey = getApiKey();
	if (apiKey) headers['X-Api-Key'] = apiKey;

	const res = await fetchFn(`${getBackendUrl()}${path}`, {
		...options,
		headers
	});
	if (res.status === 401) {
		const err = new Error('unauthorized') as Error & { status?: number };
		err.status = 401;
		throw err;
	}
	if (!res.ok) throw new Error(`Admin request failed: ${path} (${res.status})`);
	if (res.status === 204) return undefined as T;
	return res.json();
}

// Auth — there's no backend session to create; "logging in" means storing the
// entered key locally and confirming it actually works with one real authenticated
// call (getSettings has no side effects), and "logging out" is just discarding it.
export async function login(apiKey: string, fetchFn: typeof fetch = fetch): Promise<void> {
	setApiKey(apiKey);
	try {
		await getSettings(fetchFn);
	} catch (err) {
		clearApiKey();
		if ((err as { status?: number }).status === 401) throw new Error('Invalid API key');
		throw err;
	}
}

export async function logout(): Promise<void> {
	clearApiKey();
}

// Settings
export const getSettings = (fetchFn?: typeof fetch) =>
	request<AdminSettings>('/api/admin/settings', {}, fetchFn);

export const updateSettings = (patch: Partial<AdminSettings>, fetchFn?: typeof fetch) =>
	request<AdminSettings>('/api/admin/settings', { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

// Categories
export const createCategory = (name: string, isPrivate = false, isSpillover = false, fetchFn?: typeof fetch) =>
	request<CategoryPriority>(
		'/api/admin/categories',
		{ method: 'POST', body: JSON.stringify({ name, isPrivate, isSpillover }) },
		fetchFn
	);

export const deleteCategory = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/categories/${id}`, { method: 'DELETE' }, fetchFn);

// Sources
export const getSources = (fetchFn?: typeof fetch) =>
	request<AdminSource[]>('/api/admin/sources', {}, fetchFn);

export const addSource = (source: Partial<AdminSource>, fetchFn?: typeof fetch) =>
	request<AdminSource>('/api/admin/sources', { method: 'POST', body: JSON.stringify(source) }, fetchFn);

export const updateSource = (id: string, patch: Partial<AdminSource>, fetchFn?: typeof fetch) =>
	request<AdminSource>(`/api/admin/sources/${id}`, { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

export const deleteSource = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/sources/${id}`, { method: 'DELETE' }, fetchFn);

export const pollSourceNow = (id: string, fetchFn?: typeof fetch) =>
	request<{ ingested: number; source: AdminSource }>(`/api/admin/sources/${id}/poll`, { method: 'POST' }, fetchFn);

// Deletes this source's published articles and requeues their raw items for republish —
// picks up pipeline changes without needing the feed to resurface the same items.
export const reissueSourceContent = (id: string, fetchFn?: typeof fetch) =>
	request<{ articlesDeleted: number; itemsRequeued: number }>(`/api/admin/sources/${id}/reissue`, { method: 'POST' }, fetchFn);

// Content clearing — wipe articles/media/a source's raw items so they can be repopulated fresh.
export const clearSourceContent = (id: string, fetchFn?: typeof fetch) =>
	request<{ itemsDeleted: number; articlesDeleted: number }>(`/api/admin/content/sources/${id}`, { method: 'DELETE' }, fetchFn);

export const clearAllArticles = (fetchFn?: typeof fetch) =>
	request<{ deleted: number }>('/api/admin/content/articles', { method: 'DELETE' }, fetchFn);

export const clearAllMedia = (fetchFn?: typeof fetch) =>
	request<{ deleted: number }>('/api/admin/content/media', { method: 'DELETE' }, fetchFn);

// Tracked events
export const getEvents = (fetchFn?: typeof fetch) =>
	request<AdminTrackedEvent[]>('/api/admin/events', {}, fetchFn);

export const addEvent = (event: Partial<AdminTrackedEvent>, fetchFn?: typeof fetch) =>
	request<AdminTrackedEvent>('/api/admin/events', { method: 'POST', body: JSON.stringify(event) }, fetchFn);

export const updateEvent = (id: string, patch: Partial<AdminTrackedEvent>, fetchFn?: typeof fetch) =>
	request<AdminTrackedEvent>(`/api/admin/events/${id}`, { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

export const deleteEvent = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/events/${id}`, { method: 'DELETE' }, fetchFn);

// Models / AI service
export const getModels = (fetchFn?: typeof fetch) =>
	request<ModelCatalog>('/api/admin/models', {}, fetchFn);

export const getAiStatus = (fetchFn?: typeof fetch) =>
	request<AiStatus>('/api/admin/ai-status', {}, fetchFn);

// Telegram account (Connections tab) — API ID/hash and the resulting login session are
// stored encrypted at rest server-side (see backend telegram/credentials.ts); none of
// these ever come back from the server, only status flags.
export const getTelegramStatus = (fetchFn?: typeof fetch) =>
	request<TelegramStatus>('/api/admin/telegram/status', {}, fetchFn);

export const saveTelegramCredentials = (apiId: number, apiHash: string, fetchFn?: typeof fetch) =>
	request<{ credentialsConfigured: boolean }>(
		'/api/admin/telegram/credentials',
		{ method: 'POST', body: JSON.stringify({ apiId, apiHash }) },
		fetchFn
	);

export const startTelegramLogin = (phoneNumber: string, fetchFn?: typeof fetch) =>
	request<{ phase: 'code-sent' }>(
		'/api/admin/telegram/login/start',
		{ method: 'POST', body: JSON.stringify({ phoneNumber }) },
		fetchFn
	);

export const verifyTelegramCode = (code: string, fetchFn?: typeof fetch) =>
	request<{ phase: 'connected' | 'password-needed'; connected?: boolean; phone?: string | null }>(
		'/api/admin/telegram/login/verify',
		{ method: 'POST', body: JSON.stringify({ code }) },
		fetchFn
	);

export const verifyTelegramPassword = (password: string, fetchFn?: typeof fetch) =>
	request<{ phase: 'connected'; connected?: boolean; phone?: string | null }>(
		'/api/admin/telegram/login/verify',
		{ method: 'POST', body: JSON.stringify({ password }) },
		fetchFn
	);

export const telegramLogout = (fetchFn?: typeof fetch) =>
	request<TelegramStatus>('/api/admin/telegram/logout', { method: 'POST' }, fetchFn);

// Logs
export const getLogs = (filters: { level?: 'info' | 'warn' | 'error'; limit?: number } = {}, fetchFn?: typeof fetch) => {
	const qs = new URLSearchParams(filters as Record<string, string>).toString();
	return request<LogEntry[]>(`/api/admin/logs${qs ? `?${qs}` : ''}`, {}, fetchFn);
};

// Weather — config/cache now live behind the widget's own dedicated admin route (see
// backend/src/widgets/weather/plugin.ts) rather than riding along on AdminSettings.
export const getWeatherConfig = (fetchFn?: typeof fetch) =>
	request<AdminWeatherSettings>('/api/admin/widget/weather', {}, fetchFn);

export const updateWeatherConfig = (patch: Partial<AdminWeatherSettings>, fetchFn?: typeof fetch) =>
	request<AdminWeatherSettings>('/api/admin/widget/weather', { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

export const geocodeLocation = (query: string, fetchFn?: typeof fetch) =>
	request<GeocodeResult[]>(`/api/admin/widget/weather/geocode?query=${encodeURIComponent(query)}`, {}, fetchFn);

// Stocks
export const getStockTickers = (fetchFn?: typeof fetch) =>
	request<AdminStockTicker[]>('/api/admin/widget/stocks', {}, fetchFn);

export const addStockTicker = (label: string, symbol: string, fetchFn?: typeof fetch) =>
	request<AdminStockTicker>('/api/admin/widget/stocks', { method: 'POST', body: JSON.stringify({ label, symbol }) }, fetchFn);

export const updateStockTicker = (id: string, patch: { label?: string; symbol?: string }, fetchFn?: typeof fetch) =>
	request<AdminStockTicker>(`/api/admin/widget/stocks/${id}`, { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

export const deleteStockTicker = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/widget/stocks/${id}`, { method: 'DELETE' }, fetchFn);

// Bookmarks
export const getAdminBookmarks = (fetchFn?: typeof fetch) =>
	request<AdminBookmark[]>('/api/admin/widget/bookmarks', {}, fetchFn);

export const addBookmark = (name: string, url: string, isPrivate = false, fetchFn?: typeof fetch) =>
	request<AdminBookmark>(
		'/api/admin/widget/bookmarks',
		{ method: 'POST', body: JSON.stringify({ name, url, isPrivate }) },
		fetchFn
	);

export const updateBookmark = (id: string, patch: { name?: string; url?: string; isPrivate?: boolean }, fetchFn?: typeof fetch) =>
	request<AdminBookmark>(`/api/admin/widget/bookmarks/${id}`, { method: 'PATCH', body: JSON.stringify(patch) }, fetchFn);

export const deleteBookmark = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/widget/bookmarks/${id}`, { method: 'DELETE' }, fetchFn);

// PoE2 — league is always auto-detected, never admin-set (see widgets/poe2/poll.ts).
export const browsePoe2Currencies = (fetchFn?: typeof fetch) =>
	request<Poe2BrowseEntry[]>('/api/admin/widget/poe2/browse', {}, fetchFn);

export const getPoe2Watchlist = (fetchFn?: typeof fetch) =>
	request<AdminPoe2Entry[]>('/api/admin/widget/poe2/watchlist', {}, fetchFn);

export const addPoe2WatchlistEntry = (
	base: { currencyId: string; name: string },
	quote: { currencyId: string; name: string },
	fetchFn?: typeof fetch
) =>
	request<AdminPoe2Entry>(
		'/api/admin/widget/poe2/watchlist',
		{ method: 'POST', body: JSON.stringify({ base, quote }) },
		fetchFn
	);

export const removePoe2WatchlistEntry = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/widget/poe2/watchlist/${id}`, { method: 'DELETE' }, fetchFn);

// Pluggable widgets (upload/list/enable/delete) — see backend/src/widgets/install.ts,
// uninstall.ts. Built-in widgets (source: 'builtin') 400 on deleteWidget.
export const listWidgets = (fetchFn?: typeof fetch) =>
	request<InstalledWidget[]>('/api/admin/widgets', {}, fetchFn);

export const installWidget = (manifest: WidgetUploadManifest, files: Record<string, string>, fetchFn?: typeof fetch) =>
	request<{ id: string }>('/api/admin/widgets', { method: 'POST', body: JSON.stringify({ manifest, files }) }, fetchFn);

export const setWidgetEnabled = (id: string, enabled: boolean, fetchFn?: typeof fetch) =>
	request<InstalledWidget>(`/api/admin/widgets/${id}`, { method: 'PATCH', body: JSON.stringify({ enabled }) }, fetchFn);

export const deleteWidget = (id: string, fetchFn?: typeof fetch) =>
	request<void>(`/api/admin/widgets/${id}`, { method: 'DELETE' }, fetchFn);